Discussion on the technical data of CNC cutting operation
With the spindle speed unchanged, the surface roughness increases as the feed rate increases. When finishing, the feed rate is generally selected according to the requirements of surface roughness. When the surface roughness is small, a small feed rate should be selected, generally in the range of 40 to 50 mm/min. In the case of rough machining, in order to improve the productivity, high milling can be selected in order to improve the productivity. The speed is generally selected in the range of 100 to 200 mm/min. When the feed rate is constant, the surface roughness decreases as the spindle speed increases. The spindle speed should be selected based on the allowable cutting speed and tool diameter. The relationship between the spindle speed and the cutting speed is as follows: v=Ï€Dn/1000 where: v is the cutting speed (m/min), which is determined by the durability of the tool; n is the spindle speed (r/min), which is represented by the S code during programming. ;D? Tool diameter (mm). The calculated spindle speed n must be selected according to the machine manual. The spindle speed is generally selected from 400 to 1200r/min during roughing, and the spindle speed is generally selected between 1200 and 3500r/min during finishing. . In the case where the feed rate is constant, the surface roughness value decreases as the feed amount f per tooth decreases, but the tool is easily worn. f is optimal between 0.06 and 0.08. The milling depth also has a great influence on the roughness, preferably between 3 and 8 mm for roughing and 0.1 to 0.3 mm for finishing. When the workpiece, tool, and machine parameters are determined, the main factors affecting production efficiency and processing quality are cutting speed, feed rate, depth of cut, and cutting width. The depth of cut is determined by the stiffness of the machine tool, workpiece and tool, and is mainly limited by the stiffness of the machine. The cutting depth should be as large as possible if the machine tool stiffness is allowed. If it is not limited by the machining accuracy, the cutting depth can be equal to the machining allowance of the part. This can reduce the number of passes and increase production efficiency. In order to ensure the quality of the machined surface, it should be determined according to the machining allowance, leaving a small amount of finishing allowance. In general roughing, the full feed should be cut off as much as possible. When the amount of back-feeding knife is uneven, the roughing is divided into several feeds, and the cutting depth of the first and second feeds should be made as large as possible; on medium-powered machines, the cutting depth is 8-10 mm. . For semi-finishing, the depth of cut is chosen to be 0.5 to 2 mm. For finishing, the cutting depth is selected from 0.2 to 0.5 mm. In summary, the specific value of the depth of cut should be determined by analogy based on machine performance, relevant manuals, and practical experience. (Finish) Explosion-Proof Safe Barrier,Explosion-Proof Electronic Safe Barrier,Explosion-Proof Atex Safe Barrier,Explosion-Proof Barriers Cable Safely Jiangsu Lude Electrical Manufacturing Co.,Ltd , https://www.ludescale.com